Dude dude dude, so so so wrong.
Asteroid have achieved equilibrium with thier plasma environment, comets have not. You know, the whole point of the ELECTRIC UNIVERSE.
charged bodies immersed in a plasma... so so simple.
Nice confabulation though, you and rc should really get together.
I’ll supply you a paper an strong electric fields at a comet and you find the highest measured electric field at an asteroid.
Now, unfortunately the paper does no cut and paste nicely but you can find the relevant parts easy enough.
Electric fields and cold electrons in the vicinity of comet Halley
Also very strong ( near On undeniable) evidence of my beloved plasma double layers.